loongson/mirror: links for merakiv2

loongson/mirror merakiv2-2.1.7.tar.gz
loongson/mirror merakiv2-2.1.6.tar.gz
loongson/mirror merakiv2-2.1.5.tar.gz
loongson/mirror merakiv2-2.1.4.tar.gz
loongson/mirror merakiv2-2.0.tar.gz